Initial LibGDX project scaffold for ArtLegend

Multi-module Gradle setup targeting Android (S-Pen) and Desktop (Wacom/LWJGL3).
Includes core game stub, Android launcher with immersive mode, and desktop launcher.
Asset directory shared across platforms. Gradle 8.6, Kotlin 1.9.23, LibGDX 1.12.1.

desktop/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    kotlin("jvm")
+    application
+}
+
+val gdxVersion: String by project
+
+dependencies {
+    implementation(project(":core"))
+    implementation("com.badlogicgames.gdx:gdx-backend-lwjgl3:$gdxVersion")
+    implementation("com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-desktop")
+}
+
+application {
+    mainClass.set("com.artlegend.DesktopLauncherKt")
+}
+
+kotlin {
+    jvmToolchain(17)
+}
+
+tasks.withType<Jar> {
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    manifest {
+        attributes["Main-Class"] = "com.artlegend.DesktopLauncherKt"
+    }
+    from(configurations.runtimeClasspath.get().map { if (it.isDirectory) it else zipTree(it) })
+}

desktop/src/main/kotlin/com/artlegend/DesktopLauncher.kt

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+package com.artlegend
+
+import com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application
+import com.badlogic.gdx.backends.lwjgl3.Lwjgl3ApplicationConfiguration
+
+fun main() {
+    val config = Lwjgl3ApplicationConfiguration().apply {
+        setTitle("ArtLegend")
+        setWindowedMode(1280, 800)
+        setForegroundFPS(60)
+        useVsync(true)
+    }
+    Lwjgl3Application(ArtLegend(), config)
+}